Pneumatic tire for vehicle-wheels.



a. ngssow. PNEUMATEG TIRE FOR VEHICLE WHEELS. AQPPLIOATION FILED JUNE 21, 1911.

Patented, May 7, 1912 GEOBIGES DESSON, Gi PARIS, FRANCE.

PNEUMATIC TIRE FOR VEHICLE-WHEELS.

Specification of Letters Patent.

- Patented May 7, 1912.

Application filed June 21, 1911. Serial No. 634,631.

To all whom it may concern:

lle it. known that I. Gnonuns .Dusstmz. a citizen of the French Republic. residing at Paris. France. have invented certain new and useful Improvements in Pneumatic Tires for Vehicle-dwells of which the following is a specification.

This invention relates to improvei'nents in elastic wheel tires which are constructed so that they. combine the advantages of pneu niatic tires with those ot'thc solid i-ndia rubber tires.

in the accompanying proved tire is shown.

Figure l represents the improved tire in a .-ross section. Fig. 2 is a partial lateral elevation of ldig. l. 1

The improved tire essentially consists of two,inextonsible lateral parts a and. 7) made oi leather or oi canvas strongly in'i preg' nated with caoutchouc and of strips of imliau-ublwr. The strips of these different materials are juxtaposed and vulcanized together. .it the inner edges of: the lateral parts the usual shoulders c and (Z are arianged designed to engage with the curved edges c of the wheel rim. [is the lateral parts of the tire are almost (lat. they are easy to manufacture and the number of layers is not limited as the case with the ordinary pneumatic tires for motor-cars owing to the curvature oi the envelop.

Between the outer free edges of the. lateral parts a and b of the tire a thick rubber tire i is arranged which forms the tread.

proper. This rubber'tread i is reinforced by the insertion of" a certain number of strips 7r: of canvas and it has at its inner ends two ShouldersWi- 'n between which a ring r oi india-rubber is in'closed. This block or tiller r fills in the space between the lower parts of the inner surfaces of the tread i so thatan annular chamber is formed in said tread 2T.

The lateral parts cz-b a re connected with each other and with the tread a' by means of tubular cross bolts 1/) of steel or of any other suitable material, which are arranged parallel with the axis of the hub. The outer ends of said tubular bolts 3*) are bent out drawings the imward, washers q of suitable material being placed between the flanges of the tubular bolts and the outer surfaces of the lateral parts (ii-J). There are used as many tubular bolts as necessary. The ring shaped filler r has a circular groove 8 in its outer surface which registers with a hole in each of the tubular bolts 1' so that the annular chamber 0 communicates with the outer air through said tubular bolts as indicated by the arrows in Fig. 1. The casing for the pneumatic'tube g is formed by the said lateral parts a'72 and the tread proper The pneumatic tube is inflated in the well known manner bymeans of an air valve.

The improved wheel tire as hereinbefore described is cheap to manufacture and it combines the advantages of a solid rubber tire (the tread i) with those otthepneumatic tires (9) without however presenting any of the inconveniences inhering to the tires of the two types used separately, owing to the combination of the two types of tires. The tread i has the elasticity of pneumatic tires but it avoids the danger of puno ture which forms the great inconvenience of such air tires. Further, owing to the active ventilationwhich is efiiected through the tubular bolts 7), the rubber of thetrcad prevented from getting hot. The tire is easy to put on or to take oil and the tread i, if worn, can be easily replaced. I

Fig. 2 shows the improved tire with a non-skidding tread. The band 27 of leather or of other convenient material formingthe non-skidding tread is placed upon the rub ber tread i with which it is connected by, vulcanizing. The edges of the non-skidding tread-t are fixed by the; washers and by the flanges 01 the tubular bolts p. A strip 7L of convenient material is placed between the non-skidding tread t and the rubber tread z. The metal rivets Q) can be fixed in the nonskidding tread t in any convenient manner. The lateral parts a-b of the casing of the tire could further be cut out of an ordinary mantle of a pneumatic tire.

I claim:

An improved tirelfor vehicle wheels comprising in combination a solid rubber tread and an air chamber, a casing 0 1 said air annular chamber, substantially asdescribed chamber formed of two lateral ringe, a tread n e 1 indie-rubber fixed between the outer said lateral rings, said tread hm J m annular clmmber, tubular cross bolt-s eenneeting the lateral. parts of the'casing with each other and with the tr having role communicating With the said and shown and for the purpose set forth. 10

In witness whereof I have hereunto set my hand in the presence of two Witnesses.

ALBm-rr m: CALKLADH. 

